CN104954281A - Communication method, system thereof, resource pool management system, switches, and control device - Google Patents

Communication method, system thereof, resource pool management system, switches, and control device Download PDF

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Publication number
CN104954281A
CN104954281A CN201410127774.0A CN201410127774A CN104954281A CN 104954281 A CN104954281 A CN 104954281A CN 201410127774 A CN201410127774 A CN 201410127774A CN 104954281 A CN104954281 A CN 104954281A
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China
Prior art keywords
virtual machine
message
switch
network
stream table
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CN201410127774.0A
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CN104954281B (en
Inventor
李晨
黄璐
刘志恒
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Priority to CN201410127774.0A priority Critical patent/CN104954281B/en
Priority to EP14888266.5A priority patent/EP3128705B1/en
Priority to PCT/CN2014/095739 priority patent/WO2015149563A1/en
Priority to US15/122,323 priority patent/US9992104B2/en
Publication of CN104954281A publication Critical patent/CN104954281A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/38—Flow based routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/64—Routing or path finding of packets in data switching networks using an overlay routing layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The present invention provides a communication method of an SDN, a system thereof, a resource pool management system, switches, and a control device. The communication method comprises a step of obtaining the network attributes of virtual machines configured by the a resource pool management system according to the operation of a network resource pool by a user, a step of translating tenant network topology information obtained from the network attributes as a flow table when a first virtual machine and a second virtual machine communicate for the first time, and a step of issuing the flow table to the switches corresponding to the virtual machines such that the packet between the first virtual machine and the second virtual machines is discarded in the first time communication and subsequent communication when the switches judges that the first virtual machine and the second virtual machine can not communicate. According to the communication method, the broadcast of an ARP message to a whole network by a controller can be avoided, the packet_in packet sent to an SDN controller can be reduced, thus the network resources in the SDN can be fully utilized, and the resource pressure of the network and the controller can be eased.

Description

Communication means, system, resource pool management system, switch and control device
Technical field
The present invention relates to network communication technology field, refer in particular to the communication means of a kind of SDN (software defined network), system, resource pool management system, switch and control device.
Background technology
Software defined network (Software-Defined Net working, SDN) is the most popular future network technology recent years, is also the hot-candidate latticed form of enterprise network, campus network, data center network.Its core concept is datum plane and being separated of control plane, and adopts long-range controller to concentrate and unifies management and control to network.
In SDN, network control with forward separated and processed by task equipment.Forwarded has been responsible for by the proprietary SDN switch based on OpenFlow.Network-based control function is completed by the SDN controller based on OpenFlow, and controller completes the computing of network basic function, as Topology Management, stream table management, Equipments Setting etc.
If Fig. 1 is the one citing that prior art SDN framework realizes, existing SDN communication work mechanism is, composition graphs 1, is made up of three Openflow switches in network, is called for short OF switch.Three OF switches are controlled by Openflow agreement by a SDN controller, and OF switch 1 and OF switch 3 are as access switch, and access two host As and B, OF switch 2 are connected with SDN controller as convergence switch respectively.
When the host A (physical server or virtual machine) of access network proposes communication requirement to SDN, require to communicate with host B, OF switch 1 judges it is when first time receiving this request data package, then the first packet of packet is transmitted to SDN controller, send also referred to as on packet_in.
Afterwards, SDN controller generates stream table according to first packet, and concrete mode is: after SDN controller receives first packet information, judges (comprising object MAC, object IP etc.) that the object receiving terminal of packet is host B according to five-tuple information.If stored the position of B in SDN controller, then start the end-to-end stream table calculating A to B, and be handed down to the OF switch 3 on path.Otherwise SDN controller is broadcasted an ARP message to the whole network and is searched host B.This ARP broadcast is responded by OF switch 3, and feeds back to SDN controller.SDN controller is according to topology information, and hop-by-hop generates stream table, namely on OF switch 1: port corresponding to place host A is to OF switch 2 place port; On OF switch 2: OF switch 1 corresponding ports is to OF switch 3 place port; On OF switch 3: OF switch 2 corresponding ports is to host B place port, and totally three stream tables are issued to OF switch 1,2,3 respectively.
But in the mechanism sent on above-mentioned packet_in, exchange opportunity sends a large amount of packet_in messages to SDN controller, makes SDN controller performance limited, reduce network size.
Secondly, in the mechanism that above-mentioned SDN controller broadcast to the whole network, SDN controller produces a large amount of broadcasting packet, causes the waste of Internet resources, to the resource build-up of pressure of network and controller, and reduction network size.
In addition, under existing SDN framework, cloud computation data center resource pool management system (as Openstack, VMWare, Microsoft, Citrix etc.) and data center network disconnect: as operation information when resource pool carries out main frame establishment, amendment, deletion cannot pass to network.
Summary of the invention
The object of technical solution of the present invention is to provide the communication means of a kind of SDN, system, resource pool management system, switch and control device, and the ARP that SDN controller can be avoided to send broadcasts, and reduces the packet_in message sending to SDN controller.
The invention provides a kind of communication means of software defined network, for a controller, wherein said communication means comprises:
The network attribute of the virtual machine that Gains resources pond management system configures according to the operation of user to Internet resources pond;
When first time communicates between the first virtual machine with the second virtual machine, the tenant network topology information obtained from described network attribute is translated as stream table;
Described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
Preferably, communication means described above, wherein, also comprising: set up logical tunnel between the switch that described virtual machine is corresponding, connecting for making corresponding switch logic after the described network attribute of acquisition.
Preferably, communication means described above, wherein, after described stream table is issued to the step of switch corresponding to described virtual machine, also comprises: described switch, according to the communication between described stream table control first virtual machine and the second virtual machine, specifically comprises:
Receiving the first virtual machine to message during the second virtual machine communication, when judging to communicate as first time between the first virtual machine with the second virtual machine, then described message being converted to a packet_in message;
Receive the first virtual machine to message during the second virtual machine communication, when judging not to communicate as first time between the first virtual machine with the second virtual machine:
Mating described stream table judges as intercommunication between the first virtual machine and the second virtual machine, described message is sent to switch corresponding to the second virtual machine;
Mating can not intercommunication between described stream table judgement first virtual machine and the second virtual machine, directly by described packet loss;
When judging that the first virtual machine and the second virtual machine do not have mated a described stream table, described message is converted to the 2nd packet_in message.
Preferably, communication means described above, wherein, described communication means also comprises:
Desampler send on to deliver newspaper literary composition;
When literary composition of delivering newspaper on described is a packet_in message, then described tenant network topology information is translated as stream table;
When literary composition of delivering newspaper on described is the 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, form the stream table between the first virtual machine and the second virtual machine, and send to the first virtual machine and switch corresponding to the second virtual machine respectively.
Preferably, communication means described above, wherein, in the step of the network attribute of the virtual machine that described Gains resources pond management system configures according to the operation of user to Internet resources pond, described network attribute is recorded in network information table, and described network information table is created according to described network attribute by described resource pool management system.
Preferably, communication means described above, wherein, described tenant network topology information comprise tenant's subnet section intercommunication policy information, virtual machine place server host positional information and virtual machine be connected the information of switch, wherein said subnet section intercommunication policy information is pre-configured by described resource pool management system by user.
Preferably, communication means described above, wherein, described network attribute comprises the IP address of the virtual machine that resource pool management system configures according to the operation of user, VLAN ID, VXLAN ID, tunnel ID, VRF ID, the information of virtual machine place server host, server host connect physical switch, tenant network topology information.
The present invention also provides a kind of control device of software defined network, comprises a controller, and wherein said controller comprises:
Data reception module, for the network attribute of the virtual machine that Gains resources pond management system configures according to the operation of user to Internet resources pond;
Data processing module, for when first time communicates between the first virtual machine with the second virtual machine, is translated as stream table by the tenant network topology information obtained from described network attribute;
Data transmission module, for described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
Preferably, control device described above, wherein, described controller also comprises:
Resource sets up module, for for setting up logical tunnel between switch corresponding to described virtual machine, corresponding switch is connected.
Preferably, control device described above, wherein, described data reception module also for: desampler send on to deliver newspaper literary composition; When literary composition of wherein delivering newspaper on described is a packet_in message, described data processing module starts; A described packet_in message be switch receive the first virtual machine to second virtual machine first time communication message time, conversion is carried out to described message and obtained;
Described controller also comprises:
Path calculation module, when being the 2nd packet_in message for literary composition of delivering newspaper on described, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, form the stream table between the first virtual machine and the second virtual machine, and send to the first virtual machine and switch corresponding to the second virtual machine respectively; Wherein when switch receives the first virtual machine to message during the second virtual machine non-first time communication, when judging that the first virtual machine and the second virtual machine do not have mated a described stream table, described message be converted to the 2nd packet_in message and be sent to described data reception module.
Preferably, control device described above, wherein, described data reception module obtains network information table from described resource pool management system, described network attribute is recorded in described network information table, and described network information table is created according to described network attribute by described resource pool management system.
Preferably, control device described above, wherein, described tenant network topology information comprises tenant's subnet section intercommunication policy information, the positional information of virtual machine place server host and virtual machine be connected the information of switch, wherein said subnet section intercommunication policy information is pre-configured by described resource pool management system by user.
Preferably, control device described above, wherein, described network attribute comprises physical switch, the tenant network topology information that resource pool management system connects according to the information of the IP address of the operation institute configuring virtual machine of user, VLAN ID, VXLAN ID, tunnel ID, VRF ID, virtual machine place server host, server host.
The present invention also provides the communication means of another kind of software defined network, and for resource pool management system, wherein, described communication means comprises:
According to the operative configuration virtual machine of user to Internet resources pond, it is described virtual machine configuration network resource;
According to the information generating network attribute of described Internet resources;
Described network attribute is sent to controller, described controller is enable to obtain tenant network topology information from described network attribute, and when between the first virtual machine with the second virtual machine, first time communicates, described tenant network topology information can be translated as stream table, described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
Preferably, communication means described above, wherein, according to the operative configuration virtual machine of user to Internet resources pond, for the step of described virtual machine configuration network resource comprises:
According to the operation of user to Internet resources pond, at the virtual machine of the corresponding described operation of resource pool configuration;
According to the virtual machine that resource pool configures, in the physical network resource be made up of multiple servers main frame and switch, wherein under the physical port of at least one station server main frame and logic port, create the virtual machine of equal number, and configure corresponding Internet resources.
Preferably, communication means described above, wherein, also comprises after the step of the information generating network attribute according to described Internet resources:
Form network information table according to described network attribute, by described network information table is sent to controller, described network attribute is sent to controller.
The present invention also provides a kind of resource pool management system, comprising:
Resource management module, for according to the operative configuration virtual machine of user to Internet resources pond, is described virtual machine configuration network resource;
Attribute generation module, for the information generating network attribute according to described Internet resources;
Information sending module, for described network attribute is sent to controller, described controller is enable to obtain tenant network topology information from described network attribute, and when between the first virtual machine with the second virtual machine, first time communicates, described tenant network topology information can be translated as stream table, described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
Preferably, resource pool management system described above, wherein, described resource management module comprises:
Managing computing resources unit, for according to the operation of user to Internet resources pond, at the virtual machine of the corresponding described operation of resource pool configuration;
Network resource management unit, for the virtual machine configured according to resource pool, in the physical network resource be made up of multiple servers main frame and switch, wherein under the physical port of at least one station server main frame and logic port, create the virtual machine of equal number, and configure corresponding Internet resources.
The present invention also provides the communication means of another kind of software defined network, and for switch, wherein said communication means comprises:
Receive the first virtual machine to message during the second virtual machine communication;
Obtain for making resource pool management system according to the stream table of user to the operation institute configuring virtual machine communication in Internet resources pond from controller, mate according to described stream table, obtain matching result, wherein said stream table is the tenant network topology information generation of controller according to the Internet resources of virtual machine;
According to matching result, when judging can not communicate between the first virtual machine with the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
Preferably, communication means described above, also comprises after the step of the message wherein when described reception first virtual machine communicates to the second virtual machine:
Judge between the first virtual machine with described second virtual machine whether be communicate first time, when communicating for first time, then described message be converted to a packet_in message and be sent to controller; When not communicating for first time, then perform step downwards.
Preferably, communication means described above, wherein, also comprises after the step obtaining described matching result:
When according to matching result, when to judge between the first virtual machine and the second virtual machine as intercommunication, described message is sent to switch corresponding to the second virtual machine;
When according to matching result, when judging the described stream table that the first virtual machine and the second virtual machine do not match, described message be converted to the 2nd packet_in message and send to controller, controller is made to obtain described 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end to path, forms the stream table between the first virtual machine and the second virtual machine.
The present invention also provides a kind of switch, comprising:
Receive message module, for receiving the first virtual machine to message during the second virtual machine communication;
Matching module, for obtaining for making resource pool management system according to the stream table of user to the operation institute configuring virtual machine communication in Internet resources pond from controller, mate according to described stream table, obtain matching result, wherein said stream table is the information generation of controller according to the Internet resources of virtual machine;
First message processing module (MPM), for according to matching result, when judging can not communicate between the first virtual machine with the second virtual machine, in first time communication and subsequent communications, directly abandons the message between the first virtual machine and the second virtual machine.
Preferably, switch described above, wherein, described switch also comprises:
Whether judge module is communicate first time for judging between the first virtual machine with described second virtual machine;
Message modular converter, when communicating for first time, is then converted to a packet_in message by described message and is sent to controller; When not communicating for first time, then described message is sent to described matching module.
Preferably, switch described above, wherein, described switch also comprises:
Second message process unit, for when to judge between the first virtual machine and the second virtual machine as intercommunication according to matching result, is sent to switch corresponding to the second virtual machine by described message;
3rd message process unit, for when judging the described stream table that the first virtual machine and the second virtual machine do not match according to matching result, described message be converted to the 2nd packet_in message and send to controller, controller is made to obtain described 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, forms the stream table between the first virtual machine and the second virtual machine.
The present invention also provides a kind of communication system of software defined network, comprise multiple servers main frame, wherein, also comprise control device as above, resource pool management system as above and switch as above, wherein server host described in each is connected with wherein switch described in, described switch and described control device, described control device is connected with described resource pool management system.
At least one in specific embodiment of the invention technique scheme has following beneficial effect:
Controller is according to the network attribute of institute's sink virtual machine, grasp full mesh topology, compared to prior art SDN framework, when avoiding two virtual machines to communicate first, controller is to the whole network broadcast ARP message, and make switch storage flow table, switch directly can judge according to stream table the situation that two virtual machines can not communicate, thus the message directly abandoned between two virtual machines, relative to prior art, reduce the packet_in message sending to SDN controller when two virtual machines can not communicate, Internet resources in SDN are fully used, alleviate the resource pressure of network and controller.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art SDN framework citing;
Fig. 2 is the configuration diagram of the specific embodiment of the invention for the communication system of SDN;
The structure that Fig. 3 is resource pool management system described in the present invention and and each several part between the schematic diagram of annexation;
The structure that Fig. 4 is controller described in the present invention and and each several part between the schematic diagram of annexation;
The structure that Fig. 5 is switch described in the present invention and and each several part between the schematic diagram of annexation;
Schematic flow sheet when Fig. 6 is the communication means establishment Internet resources adopting communication system of the present invention;
Schematic flow sheet when Fig. 7 is communication means amendment or the deletion Internet resources adopting communication system of the present invention;
Fig. 8 is the schematic flow sheet of communication means described in first embodiment of the invention;
Fig. 9 is the schematic flow sheet of communication means described in second embodiment of the invention;
Figure 10 is the schematic flow sheet of communication means described in third embodiment of the invention.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The communication means of SDN described in the specific embodiment of the invention, for a controller, comprises step:
The network attribute of the virtual machine that Gains resources pond management system configures according to the operation of user to Internet resources pond;
When first time communicates between the first virtual machine with the second virtual machine, the tenant network topology information obtained from described network attribute is translated as stream table;
Described stream table is issued to switch corresponding to described virtual machine, makes described switch according to the communication between described stream table control first virtual machine and the second virtual machine.
Communication means described in the embodiment of the present invention, by resource pool management system for the network attribute of user virtual machine institute configuration network resource is sent to controller, and by controller, the tenant network topology information obtained from network attribute is translated the stream table obtained and be issued to switch, make switch according to the communication between described stream table control first virtual machine and the second virtual machine, such as, when first virtual machine communicates with the second virtual machine, switch mates the stream table preserved to confirm that can the network segment between the first virtual machine and the second virtual machine intercommunication, can intercommunication if district's flow table judges, can make to communicate between these two virtual machines, if the judgement of coupling stream table can not intercommunication, then directly abandon the message communicated between two virtual machines, the stream table that if there is no can mate, then convert the message communicated between two virtual machines to packet_in message and send to controller, controller calculates end-to-end path according to network information table, and is handed down to corresponding switch.
Adopt above-mentioned communication means, controller is according to the network attribute of institute's sink virtual machine, grasp full mesh topology, compared to prior art SDN framework, when avoiding two virtual machines to communicate first, controller is to the whole network broadcast ARP message, and make switch storage flow table, switch directly can judge according to stream table the situation that two virtual machines can not communicate, thus the message directly abandoned between two virtual machines, relative to prior art, reduce by two virtual machines when can not communicate, and reduce the packet_in message sending to SDN controller, Internet resources in SDN are fully used, alleviate the resource pressure of network and controller.
The tenant network topology information that the present invention is above-mentioned, comprise tenant's subnet section intercommunication policy information, the positional information of virtual machine place server host and virtual machine be connected the information of switch, wherein said subnet section intercommunication policy information is pre-configured by described resource pool management system by user.
Be used for the configuration diagram of communication system of SDN below in conjunction with the specific embodiment of the invention shown in Fig. 2, the communication system of the specific embodiment of the invention and communication means are described.
According to Fig. 2, the communication system that the embodiment of the present invention is used for SDN comprises: resource pool management system 10, controller 20, switch 30 and server host 40.Wherein resource pool management system 10 is connected with user side 50, and user side 50 can create, revises or delete used Internet resources by this resource pool management system 10; Controller 20 is connected with resource pool management system 10, and is connected with switch 30, and server host 40 is connected respectively a switch 30.
As shown in Figure 3, described resource pool management system 10 comprises:
Resource management module, for according to the operative configuration virtual machine of user to Internet resources pond, is described virtual machine configuration network resource;
Attribute generation module, for the information generating network attribute according to described Internet resources;
Information sending module, for described network attribute is sent to controller 20, make described controller 20 can obtain tenant network topology information from described network attribute, and when between the first virtual machine with the second virtual machine, first time communicates, described tenant network topology information can be translated as stream table, described stream table is issued to switch corresponding to described virtual machine 30, makes to communicate according to described stream table between described virtual machine; Particularly, when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, first time communication and subsequent communications in, directly abandon the message between the first virtual machine and the second virtual machine.
Particularly, described resource management module comprises:
Managing computing resources unit, for according to the operation of user to Internet resources pond, at the virtual machine of the corresponding described operation of resource pool configuration;
Network resource management unit, for the virtual machine configured according to resource pool, in the physical network resource be made up of multiple servers main frame and switch, wherein under the physical port of at least one station server main frame and logic port, create the virtual machine of equal number, and configure corresponding Internet resources.
The resource pool management system 10 of said structure provides operation management interface for user side 50, and by this operation management interface, user side 50 can be applied for creating, amendment and the Internet resources belonging to deleting.Described resource pool management system 10 mentioned in above-mentioned is user's configuring virtual machine, comprises establishment, revises and delete corresponding virtual machine and Internet resources.After the operation requests of user side 50 on operation management interface goes through, the managing computing resources unit of resource pool management system 10 is according to user's operation to Internet resources pond on operation management interface, in resource pool configuration to the virtual machine that should operate, comprising deleting old virtual machine and creating new virtual machine etc.; Simultaneously, this managing computing resources unit informing network rm-cell, make network resource management unit according to the virtual machine configured at resource pool, under the physical port and logic port of one or more server host, create the virtual machine of equal number, and configure corresponding Internet resources for those virtual machines, on the port of server host 40, generate empty machine for this user side formation logic network.
Illustrate, establishment virtual machine instance is operating as with user side, as shown in Figure 2, for first user end (tenant 1), the physical port of the server host 40 be connected at switch A, switch b and interchanger C respectively and logic port create virtual machine VM1 to VM3(represents tenant 1 in fig. 2 virtual machine with horizontal interstitial wire); For the second user side (tenant 2), the physical port of the server host 40 be also connected at switch A, switch b and interchanger C respectively and logic port create virtual machine VM1 to VM3(represents tenant 1 in fig. 2 virtual machine with vertical interstitial wire).
Wherein, according to the solid line connecting line of Fig. 2, switch A, switch b, there is between switch C and switch D corresponding physical connection.
In addition, controller 20 for setting up logical tunnel between switch corresponding to described virtual machine, can connect, as the dashed connection line of Fig. 2 for making corresponding switch logic.
According to above structure, resource pool management system 10 is the virtual machine configuration network resource that user side is corresponding, and those Internet resources comprise: physical switch, tenant network topology information etc. that the information of IP address, VLAN ID, VXLAN ID, tunnel ID, VRF ID, virtual machine place server host, server host connect.In addition user side can by the access strategy between the operation management interface self-configuring same network segment of resource pool management system 10 or cross-network segment virtual machine, form subnet section intercommunication policy information, the positional information of this subnet section intercommunication policy information, virtual machine place server host and virtual machine be connected the combination of the information of switch, be configured to tenant network topology information, the combination of tenant network topology information and above-mentioned information, is configured to the network attribute of virtual machine.
Preferably, above-mentioned network attribute is recorded in a network information table by described resource pool management system 10, also namely by the link information between the information of the corresponding switch 30 of the information of the server host 40 at the corresponding virtual machine place of this network information table recording user end, this server host 40, each corresponding switch 30 and access strategy information (subnet section intercommunication policy information).
Particularly, in described network information table to preserve content as shown in table 1 below:
Table 1
User's name
User subnet section
Subnet section intercommunication strategy
Virtual machine title
Virtual machine MAC
Virtual machine IP
Place server host
Physical port used
Logic port used
Server host MAC
Server host IP
Server host connect switch
The above content of preserving in described network information table is only and illustrates, is not limited to only comprise those contents.
The network information table comprising above content is sent to controller 20 by data processing module, composition graphs 4, and consults Fig. 2, and described controller 20 comprises:
Data reception module, for the network attribute of the virtual machine that Gains resources pond management system 10 configures according to the operation of user to Internet resources pond;
Data processing module, for when first time communicates between the first virtual machine with the second virtual machine, is translated as stream table by the tenant network topology information obtained from described network attribute;
Data transmission module, for described stream table is issued to switch corresponding to described virtual machine 30, makes described switch 30 according to the communication between described stream table control first virtual machine and the second virtual machine.Particularly, when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, first time communication and subsequent communications in, directly abandon the message between the first virtual machine and the second virtual machine.
Described controller also comprises:
Resource sets up module, for for setting up logical tunnel between switch corresponding to described virtual machine, corresponding switch 30 is connected.
In addition, described data reception module also for: desampler send on to deliver newspaper literary composition; When literary composition of wherein delivering newspaper on described is a packet_in message, described data processing module starts; A described packet_in message be switch receive the first virtual machine to second virtual machine first time communication message time, conversion is carried out to described message and obtained;
Described controller also comprises:
Path calculation module, during for literary composition of delivering newspaper on described the 2nd packet_in message that is switch transmission, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, form the stream table between the first virtual machine and the second virtual machine, and send to the first virtual machine and switch corresponding to the second virtual machine respectively; Wherein when switch receives the first virtual machine to message during the second virtual machine non-first time communication, when judging that the first virtual machine and the second virtual machine do not have mated a described stream table, described message be converted to the 2nd packet_in message and be sent to data reception module.
Based on the said structure of controller 20, the data reception module of controller 20 obtains above-mentioned network information table from data processing module 10, resource is set up module and is set up logical tunnel according between the corresponding switch of network information table for user side institute configuring virtual machine, corresponding switch is connected, between the switch not having user side institute configuring virtual machine, do not set up logical tunnel, wherein this switch comprises physical switches and virtual switch.
In addition, when between the first virtual machine with the second virtual machine, first time communicates, the data processing module of described controller 20 obtains tenant network topology information from this network information table, and this tenant network topology information being translated as one or several corresponding stream table, those stream tables are issued the corresponding switch of most user side institute configuring virtual machine by data transmission module.
Composition graphs 5, described switch 30 comprises:
Receive message module, for receiving the first virtual machine to message during the second virtual machine communication;
Matching module, for obtaining for making resource pool management system according to the stream table of user to the operation institute configuring virtual machine communication in Internet resources pond from controller, mate according to described stream table, obtain matching result, wherein said stream table is the information generation of controller according to the Internet resources of virtual machine;
Message processing module (MPM), for according to matching result, controls the communication between the first virtual machine and the second virtual machine.
Described message processing module (MPM) comprises the first message processing module (MPM), for with according to matching result, when judging can not communicate between the first virtual machine with the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
In addition, described switch also comprises:
Whether judge module is communicate first time for judging between the first virtual machine with described second virtual machine;
Message modular converter, when communicating for first time, is then converted to a packet_in message by described message and is sent to controller; When not communicating for first time, then described message is sent to described matching module.
Particularly, described message processing module (MPM) comprises:
Second message process unit, during for judge between the first virtual machine and the second virtual machine as intercommunication when matching result, is sent to switch corresponding to the second virtual machine by described message;
3rd message process unit, during for judging described stream table that the first virtual machine and the second virtual machine do not match when matching result, described message be converted to the 2nd packet_in message and outwards send, controller is made to obtain described 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, forms the stream table between the first virtual machine and the second virtual machine.
Described switch 30 utilizes above-mentioned structure, when judging to communicate as first time between the first virtual machine with the second virtual machine, then described message be converted to a packet_in message and be sent to controller, stream table is obtained from controller 20, mate according to this stream table, judge whether can communicate between the first virtual machine with the second virtual machine; When judging between the first virtual machine with the second virtual machine not for communicating for the first time, then directly to mate according to described stream table.
Such as when the first virtual machine of user side 1 communicates with the second virtual machine, when judging not to communicate as first time between the first virtual machine with the second virtual machine, first the matching module of switch 30 mates the stream table of user side 1 correspondence, obtains a matching result.This matching result possesses at least three kinds of situations, the first: according to described stream table, specify to be intercommunication between the first virtual machine and the second virtual machine; The second: according to described stream table, specifying between the first virtual machine and the second virtual machine can not intercommunication; The third: the stream table that to there is not between record first virtual machine and the second virtual machine whether intercommunication.
For the first above-mentioned matching result, described message is sent to switch corresponding to the second virtual machine by the first message process unit by switch 30, makes to set up service connection between the first virtual machine and the second virtual machine;
For above-mentioned the second matching result, switch 30 by the second message process unit directly by received packet loss;
For the third above-mentioned matching result, received message is converted to the 2nd packet_in message by the 3rd message process unit and is sent to controller by switch 30, controller 20 is made to obtain described 2nd packet_in message by path calculation module, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, forms the stream table between the first virtual machine and the second virtual machine.
In addition, when for the third above-mentioned matching result, described switch 30 is also for stream table that the path calculation module receiving controller is formed according to the 2nd packet_in message.
Fig. 6, for adopting the workflow schematic diagram of communication system described in the specific embodiment of the invention, is created as example to required Internet resources with user side, comprises step on resource pool management system:
S601, user side carries out creation operation to required Internet resources on resource pool management system;
S602, this network attribute, according to the operation of user side, for virtual machine configures corresponding network attribute, and carries out storing with the form of " network information table " and sends to controller 20 by resource pool management system 10;
S603, switch 30 receives the message that the first virtual machine communicates to the second virtual machine, determines whether first time communication; When communicating for first time, message is converted to a packet_in message and is sent to controller 20 by switch 30, and downward step S604; When not communicating for first time, then perform step S605 downwards;
S604, the tenant network topology information in network information table is translated as stream table by controller 20, and stream table is issued to switch 30, and switch 30 convection current table is preserved;
S605, switch 30 mates the stream table preserved to confirm that the network segment between the first virtual machine and the second virtual machine whether can intercommunication; If energy intercommunication, is sent to switch corresponding to the second virtual machine by described message, can not intercommunication then direct dropping packets, when there is not the stream table that can mate, then message is converted to the 2nd packet_in message and send to controller 20, controller 30 is made to calculate end-to-end path according to packet_in message, form the stream table between the first virtual machine and the second virtual machine, and be issued to switch.
Process when creating the Internet resources on resource pool management system for user is above described, with should user the Internet resources on resource pool management system are modified or are deleted time, as shown in Figure 7, mainly comprise step:
User side is modified or deletion action to Internet resources on resource pool management system;
Resource pool management system, according to the operation of user side, adjusts or deletes the virtual machine of this user side, and revise network information table, and amended network information table is sent to controller, and network information table can have the information of amendment to be sent to switch by controller;
When switch receives the message that the first virtual machine sends to the second virtual machine, the communication between two virtual machines is controlled according to amended network information table, step when concrete mode and virtual machine creating is identical, can consult the specific descriptions of Fig. 6 step S603 to S605.
Therefore, by possessing the collaborative work of the resource pool management system 10 of said structure, controller 20 and switch 30, can according to the network attribute of the operation perception virtual machine of user side, Internet resources are made corresponding change, full mesh topology grasped by controller, compared to prior art SDN framework, when avoiding two virtual machines to communicate first, controller is to the whole network broadcast ARP message, and reduce the packet_in message sending to SDN controller, Internet resources in SDN are fully used, alleviate the resource pressure of network and controller.
According to the description of above operation principle of the present invention and structure, the specific embodiment of the invention provides a kind of communication system possessing said structure, and the formation of described communication system can consult above description by composition graphs 2 to Fig. 6, does not repeat them here.
In addition, the present invention also provides the communication means of a kind of SDN, for a controller, as Fig. 8, and composition graphs 2, described communication means comprises:
S701, the network attribute of the virtual machine that Gains resources pond management system configures according to the operation of user to Internet resources pond;
S702, when first time communicates between the first virtual machine with the second virtual machine, is translated as stream table by the tenant network topology information obtained from described network attribute;
S703, described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
Particularly, also comprising after step S701: set up logical tunnel between the switch that described virtual machine is corresponding, connecting for making corresponding switch logic.
In addition, after described stream table is issued to the step of switch corresponding to described virtual machine, also comprise: described switch, according to the communication between described stream table control first virtual machine and the second virtual machine, specifically comprises:
Receiving the first virtual machine to message during the second virtual machine communication, when judging to communicate as first time between the first virtual machine with the second virtual machine, then described message being converted to a packet_in message;
Receive the first virtual machine to message during the second virtual machine communication, when judging not to communicate as first time between the first virtual machine with the second virtual machine:
Mating described stream table judges as intercommunication between the first virtual machine and the second virtual machine, described message is sent to switch corresponding to the second virtual machine;
Mating can not intercommunication between described stream table judgement first virtual machine and the second virtual machine, directly by described packet loss;
When judging that the first virtual machine and the second virtual machine do not have mated a described stream table, described message be converted to the 2nd packet_in message and outwards send.
Further, after step S703, described communication means also comprises:
Desampler send on to deliver newspaper literary composition;
When literary composition of delivering newspaper on described is a packet_in message, then described tenant network topology information is translated as stream table;
When literary composition of delivering newspaper on described is the 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end to path, form the stream table between the first virtual machine and the second virtual machine, and send to the first virtual machine and switch corresponding to the second virtual machine respectively.
Preferably, in step s 701, described network attribute is recorded in network information table, and described network information table is created according to described network attribute by described resource pool management system.
Further, the present invention also provides the communication means of another kind of SDN, for resource pool management system, consults Fig. 9, and composition graphs 2, described communication means comprises:
S801, according to the operative configuration virtual machine of user to Internet resources pond, is described virtual machine configuration network resource;
S802, according to the information generating network attribute of described Internet resources;
S803, described network attribute is sent to controller, described controller is enable to obtain tenant network topology information from described network attribute, and when between the first virtual machine with the second virtual machine, first time communicates, described tenant network topology information can be translated as stream table, described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
Particularly, the step of described S801 comprises:
According to the operation of user to Internet resources pond, at the virtual machine of the corresponding described operation of resource pool configuration;
According to the virtual machine that resource pool configures, in the physical network resource be made up of multiple servers main frame and switch, wherein under the physical port of at least one station server main frame and logic port, create the virtual machine of equal number, and configure corresponding Internet resources.
Also comprise after the step of S801:
Form network information table according to described network attribute, by described network information table is sent to controller, described network attribute is sent to controller.
Another aspect of the present invention, also provides the communication means of another kind of software defined network, and for switch, according to Figure 10 and composition graphs 2, described communication means comprises:
S901, receives the first virtual machine to message during the second virtual machine communication;
S902, obtain for making resource pool management system according to the stream table of user to the operation institute configuring virtual machine communication in Internet resources pond from controller, mate according to described stream table, obtain matching result, wherein said stream table is the tenant network topology information generation of controller according to the Internet resources of virtual machine;
S903, according to matching result, when judging can not communicate between the first virtual machine with the second virtual machine, in first time communication and subsequent communications, directly abandons the message between the first virtual machine and the second virtual machine.
After the step of described S901, also comprise:
Judge between the first virtual machine with described second virtual machine whether be communicate first time, when communicating for first time, then described message be converted to a packet_in message and be sent to controller; When not communicating for first time, then perform step downwards.
Particularly, also comprise after the step of described S902:
When matching result to judge between the first virtual machine and the second virtual machine as intercommunication, described message is sent to switch corresponding to the second virtual machine;
When matching result judges the described stream table that the first virtual machine and the second virtual machine do not match, described message be converted to the 2nd packet_in message and send to controller, controller is made to obtain described 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end to path, forms the stream table between the first virtual machine and the second virtual machine.
Adopt the communication means described in the specific embodiment of the invention, controller can be avoided to the whole network broadcast ARP message, and reduce the packet_in message sending to SDN controller, the Internet resources in SDN are fully used, alleviate the resource pressure of network and controller.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (25)

1. a communication means for software defined network, for a controller, is characterized in that, described communication means comprises:
The network attribute of the virtual machine that Gains resources pond management system configures according to the operation of user to Internet resources pond;
When first time communicates between the first virtual machine with the second virtual machine, the tenant network topology information obtained from described network attribute is translated as stream table;
Described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
2. communication means as claimed in claim 1, is characterized in that, also comprises: set up logical tunnel between the switch that described virtual machine is corresponding after the described network attribute of acquisition, connects for making corresponding switch logic.
3. communication means as claimed in claim 1, it is characterized in that, after described stream table is issued to the step of switch corresponding to described virtual machine, also comprise: described switch, according to the communication between described stream table control first virtual machine and the second virtual machine, specifically comprises:
Receiving the first virtual machine to message during the second virtual machine communication, when judging to communicate as first time between the first virtual machine with the second virtual machine, then described message being converted to a packet_in message;
Receive the first virtual machine to message during the second virtual machine communication, when judging not to communicate as first time between the first virtual machine with the second virtual machine:
Mating described stream table judges as intercommunication between the first virtual machine and the second virtual machine, described message is sent to switch corresponding to the second virtual machine;
Mating can not intercommunication between described stream table judgement first virtual machine and the second virtual machine, directly by described packet loss;
When judging that the first virtual machine and the second virtual machine do not have mated a described stream table, described message is converted to the 2nd packet_in message.
4. communication means as claimed in claim 3, it is characterized in that, described communication means also comprises:
Desampler send on to deliver newspaper literary composition;
When literary composition of delivering newspaper on described is a packet_in message, then described tenant network topology information is translated as stream table;
When literary composition of delivering newspaper on described is the 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, form the stream table between the first virtual machine and the second virtual machine, and send to the first virtual machine and switch corresponding to the second virtual machine respectively.
5. communication means as claimed in claim 1, it is characterized in that, in the step of the network attribute of the virtual machine that described Gains resources pond management system configures according to the operation of user to Internet resources pond, described network attribute is recorded in network information table, and described network information table is created according to described network attribute by described resource pool management system.
6. communication means as claimed in claim 1, it is characterized in that, described tenant network topology information comprise tenant's subnet section intercommunication policy information, virtual machine place server host positional information and virtual machine be connected the information of switch, wherein said subnet section intercommunication policy information is pre-configured by described resource pool management system by user.
7. communication means as claimed in claim 1, it is characterized in that, described network attribute comprises the IP address of the virtual machine that resource pool management system configures according to the operation of user, physical switch, tenant network topology information that VLAN ID, VXLAN ID, tunnel ID, VRF ID, the information of virtual machine place server host, server host connect.
8. a control device for software defined network, comprises a controller, it is characterized in that, described controller comprises:
Data reception module, for the network attribute of the virtual machine that Gains resources pond management system configures according to the operation of user to Internet resources pond;
Data processing module, for when first time communicates between the first virtual machine with the second virtual machine, is translated as stream table by the tenant network topology information obtained from described network attribute;
Data transmission module, for described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
9. control device as claimed in claim 8, it is characterized in that, described controller also comprises:
Resource sets up module, for for setting up logical tunnel between switch corresponding to described virtual machine, corresponding switch is connected.
10. control device as claimed in claim 8, is characterized in that, described data reception module also for: desampler send on to deliver newspaper literary composition; When literary composition of wherein delivering newspaper on described is a packet_in message, described data processing module starts; A described packet_in message be switch receive the first virtual machine to second virtual machine first time communication message time, conversion is carried out to described message and obtained;
Described controller also comprises:
Path calculation module, when being the 2nd packet_in message for literary composition of delivering newspaper on described, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, form the stream table between the first virtual machine and the second virtual machine, and send to the first virtual machine and switch corresponding to the second virtual machine respectively; Wherein when switch receives the first virtual machine to message during the second virtual machine non-first time communication, when judging that the first virtual machine and the second virtual machine do not have mated a described stream table, described message be converted to the 2nd packet_in message and be sent to described data reception module.
11. control device as claimed in claim 8, it is characterized in that, described data reception module obtains network information table from described resource pool management system, described network attribute is recorded in described network information table, and described network information table is created according to described network attribute by described resource pool management system.
12. control device as claimed in claim 8, it is characterized in that, described tenant network topology information comprises tenant's subnet section intercommunication policy information, the positional information of virtual machine place server host and virtual machine be connected the information of switch, wherein said subnet section intercommunication policy information is pre-configured by described resource pool management system by user.
13. control device as claimed in claim 8, it is characterized in that, described network attribute comprises physical switch, the tenant network topology information that resource pool management system connects according to the information of the IP address of the operation institute configuring virtual machine of user, VLAN ID, VXLAN ID, tunnel ID, VRF ID, virtual machine place server host, server host.
The communication means of 14. 1 kinds of software defined networks, for resource pool management system, is characterized in that, described communication means comprises:
According to the operative configuration virtual machine of user to Internet resources pond, it is described virtual machine configuration network resource;
According to the information generating network attribute of described Internet resources;
Described network attribute is sent to controller, described controller is enable to obtain tenant network topology information from described network attribute, and when between the first virtual machine with the second virtual machine, first time communicates, described tenant network topology information can be translated as stream table, described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
15. communication meanss as claimed in claim 14, is characterized in that, according to the operative configuration virtual machine of user to Internet resources pond, for the step of described virtual machine configuration network resource comprises:
According to the operation of user to Internet resources pond, at the virtual machine of the corresponding described operation of resource pool configuration;
According to the virtual machine that resource pool configures, in the physical network resource be made up of multiple servers main frame and switch, wherein under the physical port of at least one station server main frame and logic port, create the virtual machine of equal number, and configure corresponding Internet resources.
16. communication meanss as claimed in claim 14, is characterized in that, also comprise after the step of the information generating network attribute according to described Internet resources:
Form network information table according to described network attribute, by described network information table is sent to controller, described network attribute is sent to controller.
17. 1 kinds of resource pool management systems, is characterized in that, comprising:
Resource management module, for according to the operative configuration virtual machine of user to Internet resources pond, is described virtual machine configuration network resource;
Attribute generation module, for the information generating network attribute according to described Internet resources;
Information sending module, for described network attribute is sent to controller, described controller is enable to obtain tenant network topology information from described network attribute, and when between the first virtual machine with the second virtual machine, first time communicates, described tenant network topology information can be translated as stream table, described stream table is issued to switch corresponding to described virtual machine, make when described switch according to described stream table judgement first virtual machine with when can not communicate between the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
18. resource pool management systems as claimed in claim 17, it is characterized in that, described resource management module comprises:
Managing computing resources unit, for according to the operation of user to Internet resources pond, at the virtual machine of the corresponding described operation of resource pool configuration;
Network resource management unit, for the virtual machine configured according to resource pool, in the physical network resource be made up of multiple servers main frame and switch, wherein under the physical port of at least one station server main frame and logic port, create the virtual machine of equal number, and configure corresponding Internet resources.
The communication means of 19. 1 kinds of software defined networks, for switch, is characterized in that, described communication means comprises:
Receive the first virtual machine to message during the second virtual machine communication;
Obtain for making resource pool management system according to the stream table of user to the operation institute configuring virtual machine communication in Internet resources pond from controller, mate according to described stream table, obtain matching result, wherein said stream table is the tenant network topology information generation of controller according to the Internet resources of virtual machine;
According to matching result, when judging can not communicate between the first virtual machine with the second virtual machine, in first time communication and subsequent communications, directly abandon the message between the first virtual machine and the second virtual machine.
20. communication meanss as claimed in claim 19, is characterized in that, also comprise after the step of the message when described reception first virtual machine communicates to the second virtual machine:
Judge between the first virtual machine with described second virtual machine whether be communicate first time, when communicating for first time, then described message be converted to a packet_in message and be sent to controller; When not communicating for first time, then perform step downwards.
21. communication meanss as claimed in claim 19, is characterized in that, also comprise after the step obtaining described matching result:
When according to matching result, when to judge between the first virtual machine and the second virtual machine as intercommunication, described message is sent to switch corresponding to the second virtual machine;
When according to matching result, when judging the described stream table that the first virtual machine and the second virtual machine do not match, described message be converted to the 2nd packet_in message and send to controller, controller is made to obtain described 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end to path, forms the stream table between the first virtual machine and the second virtual machine.
22. 1 kinds of switches, is characterized in that, comprising:
Receive message module, for receiving the first virtual machine to message during the second virtual machine communication;
Matching module, for obtaining for making resource pool management system according to the stream table of user to the operation institute configuring virtual machine communication in Internet resources pond from controller, mate according to described stream table, obtain matching result, wherein said stream table is the information generation of controller according to the Internet resources of virtual machine;
First message processing module (MPM), for according to matching result, when judging can not communicate between the first virtual machine with the second virtual machine, in first time communication and subsequent communications, directly abandons the message between the first virtual machine and the second virtual machine.
23. switches as claimed in claim 22, it is characterized in that, described switch also comprises:
Whether judge module is communicate first time for judging between the first virtual machine with described second virtual machine;
Message modular converter, when communicating for first time, is then converted to a packet_in message by described message and is sent to controller; When not communicating for first time, then described message is sent to described matching module.
24. switches as claimed in claim 22, it is characterized in that, described switch also comprises:
Second message process unit, for when to judge between the first virtual machine and the second virtual machine as intercommunication according to matching result, is sent to switch corresponding to the second virtual machine by described message;
3rd message process unit, for when judging the described stream table that the first virtual machine and the second virtual machine do not match according to matching result, described message be converted to the 2nd packet_in message and send to controller, controller is made to obtain described 2nd packet_in message, information according to the first virtual machine and the second virtual machine difference corresponding server main frame calculates end-to-end path, forms the stream table between the first virtual machine and the second virtual machine.
The communication system of 25. 1 kinds of software defined networks, comprise multiple servers main frame, it is characterized in that, also comprise control device, the resource pool management system as described in claim 17 or 18 and the switch as described in any one of claim 22 to 24 as described in any one of claim 8 to 13, wherein server host described in each is connected with wherein switch described in, described switch and described control device, described control device is connected with described resource pool management system.
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